Weedol® Ultra Tough Weedkiller for sale in Colchester, Essex, at Poplar Nurseries is a systemic liquid concentrate which kills perennial and other tough weeds down to the roots, so they won't grow back. It is ideal for ground clearance on untidy and overgrown areas, it works to clear tough and deep-rooted weeds such as brambles, nettles, thistles and docks. Sizes: 1 litre RTU, 8 tube carton.